Read Mac external drive on Windows machine??

My son, in the Peace Corps in Kyrgyzstan (Central Asia), spilled a glass of water into his MAC laptop. It is fried. There are no MAC dealers / repair options available. He has all of his data backed up on an external hard drive. Everyone else in his group has Windows laptops. Is there a way to read his MAC external hard drive on a Windows machine? I will have to ship him any hardware / software – internet access is sporadic and dial-up only.